CN1498483A

CN1498483A - Radio Communication apparatus and radio communication control method, radio communication apparatus and radio communication method and program program

Info

Publication number: CN1498483A
Application number: CNA038001055A
Authority: CN
Inventors: �ѹ�ï; 菅谷茂
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2002-02-05
Filing date: 2003-01-29
Publication date: 2004-05-19
Anticipated expiration: 2023-01-29
Also published as: US20120218984A1; KR101012048B1; US20190342861A1; US9179461B2; CN100534050C; US8989170B2; US20090262717A1; EP1473876A1; BR0302845A; JP3885597B2; BRPI0302845B1; US9907052B2; US20140016528A1; US7561539B2; JP2003229869A; US20040114521A1; EP1473876A4; US11229010B2; US9215709B2; US20160198436A1

Abstract

A wireless communication device in a wireless network sets management information notification cycles at specified time intervals and transmits management information containing receive timing information showing its own position to start receiving information, receive window information and receive cycle information. Another wireless communication device receiving that management information links it to a communication device number for the corresponding wireless communication device and stores the receive timing, receive window and receive cycle information. When sending information, the receive start position of the corresponding communication device is found from the receive timing, receive window and receive cycle information of the other communication party and information is then transmitted at that timing. An asynchronous ad-hoc communication wireless network can therefore be configured without a particular control station.

Description

Wireless communication system and wireless communication control method, Wireless Telecom Equipment and wireless communications method, and computer program

Technical field

The present invention relates to wireless communication system and wireless communication control method, Wireless Telecom Equipment and wireless communications method, and computer program are used for resembling WLAN (local area network (LAN)) and communicate by letter between a plurality of wireless stations.More specifically, the present invention relates to wireless communication system and wireless communication control method, Wireless Telecom Equipment and wireless communications method, and computer program are used for coming configuring wireless network by special (ad-hoc) communication that the particular device that serves as control station need not be installed.

More precisely, the present invention relates to be used for the Wireless Telecom Equipment and the wireless communications method of configuring wireless network, Wireless Telecom Equipment and wireless communications method, and computer program, terminal directly (random access) and communicate with one another asynchronously and need not to install the particular device that serves as control station wherein, more specifically, the present invention relates to be used for the wireless communication system and the wireless communication control method of configuring wireless network, Wireless Telecom Equipment and wireless communications method, and computer program, wherein terminal directly (random access) and communicate with one another is asynchronously checked the existence of other terminal simultaneously.

Background technology

Along with computer function becomes increasingly complex, become shared information (for example e-file and data) or peripheral hardware (for example printer) by connecting the Local Area Network that a plurality of computers dispose, and the universal method by Email and transfer of data exchange message.

In the prior art, Local Area Network uses optical fiber and coaxial cable or pair cable, and each computer links to each other by lead or cable.These wired lans need be installed cable and lead, and the complicated cable wiring, make to be difficult to dispose the LAN system.In addition, in case be configured the LAN system, equipment and parts can only move in the zone of cable length restriction, make these wired lans dumb and inconvenient.

WLAN has become the focus that makes the user avoid LAN line constraint in the prior art in the network system.These WLAN have been exempted the most of cable connection that uses in the working space such as office, make relative to the communication terminal that is easy to move such as personal computer (PC).

In recent years, faster and cost is lower along with its speed, the demand of Wireless LAN system is constantly increased.Especially recently, the PAN (Personal Area Network) (PAN) that is made of the small-scale wireless network comes into one's own, the information exchange between a plurality of electronic equipments that described small-scale wireless network is used for using around the daily life people.For example industrial standard IEEE802.11b and IEEE802.11a are well-known WLAN standards.

Using wireless technology to set up in the method for local area network (LAN), an equipment that is known as " access point " is being installed with as the control station in the zone, and under the overall control of this control station, is constituted network.

In the wireless network of this access point is installed, is extensive use of the access control method that keeps based on bandwidth and sends information from communication equipment.In this method, on access point, keep the required bandwidth of transmission information, do not cause so that use transmission line and conflicting between the information of other communication equipment sends.In other words, by the access point that allows the communication equipment communication synchronized with each other in the wireless network is installed, carry out sychronous wireless communication.

Once proposed the method that another is used for configuring wireless network, is known as " special communications ", this method allows to carry out asynchronous communication between terminal.In small-scale wireless network less relatively by quantity, that the approaching client in position is formed each other, this special communications is desirable, because the directly asynchronous communication each other of all terminals in the network, and need not to use particular access point.

In the communication system of forming by a plurality of terminals, must there be access control to conflict each other to prevent communication between terminals.There is Several Methods to can be used for carrying out access control in the wireless network.These methods can be divided into 2 groups.One group is that channel occupies method, for example FDMA (frequency division multiple access), TDMA (time division multiple access) and CDMA (code division multiple access).Another group is a channel sharing method, such as ALOHA and CSMA (carrier wave detection multiple access).Access control when a method that is known as CSMA/CA (carrier wave of band collision avoidance detects multiple access) is normally used for carrying out asynchronous communication in the small-scale wireless network.

In the access control method that is known as CSMA/CD (carrier wave of band collision detection detects multiple access), whether exist with the information transmission of other communication equipment and conflict by being received from the photos and sending messages input.Main this method of using in using the communicating by letter of cable and lead.On the other hand, in radio communication, be difficult to be received from the photos and sending messages signal.Conflict in the radio communication, CDMA/CA method do not begin transmission information after the message transmission from other communication equipment not checking.A plurality of terminals on this class access control permission same wireless transmission line are share and access and communicate by letter (multiple access) each other.

Another example that communicates by random access is a kind of like this method in the transmission method of prior art, wherein all communication equipments that link to each other with a network constantly monitor the information that sends by transmission line, and the communication equipment that is requested the information that sends then sends this information by transmission line.

Another example that is used for the asynchronous communication of prior art is a kind of like this method in the transmission method of prior art, each communication equipment all received signals of decoding wherein, and only detect the information that is addressed to this communication equipment.

Yet when a plurality of communication equipments began to send information simultaneously, radio communication still had the problem that clashes.In order to address this problem, the bearing calibration of a kind of RTS/CTS of being known as has been proposed, this method is by sending RTS (request sends) to recipient's target communication device before transmission information, and receive the CTS (clear to send) that returns from the message pick-up target and connect, and send information afterwards.

As mentioned above, need an access point, be used to control access to carry out the sychronous wireless communication in the wireless network.

In having the wireless communication system of this access point,, must carry out radio communication by this access point when during carrying out asynchronous communication between transmission and the received communication equipment.This has produced the transmission line utilization ratio and has been reduced the problem of half.

In addition, when using the system that keeps a part of transmission line, must reserved transmission bandwidth after the asynchronous transmission demand occurring.In the wireless communication system of division multiplexing access in use (TDMA), this also produces the problem of the information that can not send fast.

In the wireless communication system of this use time division multiplexing access, even when the transmission between the terminal is not passed through access point, terminal also must be synchronized with each other, and this makes and is difficult to realize control.

On the other hand, during the asynchronous communication in ad-hoc wireless network (wherein terminal can not used the direct communication of access point ground), sending communication equipment must check receiving communication equipment in advance.

In addition, when asynchronous transmission information, the redundant preamble signal also must be added in the information, begins so that received communication equipment can detect message transmission.

For example, being diffused into the extremely low frequency bandwidth and carrying out in the UBW of high speed data transfer (the very wideband section) radio communication, there is not the carrier wave of the radio communication that for example is used for prior art by sending data.Therefore, must begin to locate to add to have the more preamble of highly redundant degree, so that whether receiving terminal can exist and synchronous with information signal by detection signal at first in message transmission.

When the access control carried out based on CSMA/CA (carrier wave of band collision avoidance detects multiple access) method, appear at the problem that can not detect conflict when a plurality of communication equipments begin to send information simultaneously.

The critical defect of the asynchronous communication method of prior art is to carry out receiving so that catch the information that communication equipment sends from network in the unknown time all the time.Therefore, Wireless Telecom Equipment must constantly keep receiving, so that carry out the asynchronous information transmission by radio communication, this makes and can not reduce power consumption.

Be addressed to detection in the asynchronous method of reseptance of information of himself in all received signals of must decoding, receive to handle and born bigger load.This needs high speed processor and/or special installation, has therefore increased cost.

When the very high speediness transmission line is used the asynchronous wireless communication method of prior art, must use CPU to receive multiplex signal with more speed.

When asynchronous wireless communication was used the RTS/CTS access control method, each terminal must constantly keep receiving, so that detect short RTS signal.This continuous reception makes certainly and is difficult to reduce power consumption.Even there is the standard at the RTS/CTS access control method, it also is considered to be effective to communication equipment.

Summary of the invention

An object of the present invention is to provide fabulous wireless communication system and wireless communication control method, Wireless Telecom Equipment and wireless communications method, and computer program, wherein terminal can directly communicate with one another, and need not to install the particular device that serves as control station.

Another object of the present invention provides enough fabulous wireless communication system and the wireless communication control methods that directly constitutes wireless network each other with the terminal of communicating by letter asynchronously of energy, Wireless Telecom Equipment and wireless communications method, and computer program.

Another object of the present invention provides the fabulous wireless communication system and the wireless communication control method that can constitute wireless network, Wireless Telecom Equipment and wireless communications method, and computer program, the existence of other terminal is checked in wherein terminal asynchronous communication each other simultaneously.

Another object of the present invention provides the fabulous wireless communication system and the wireless communication control method that can constitute wireless network, Wireless Telecom Equipment and wireless communications method, and computer program, wherein terminal asynchronous communication each other sends the signal that comprises beacon message to other terminal simultaneously.

Another object of the present invention provides fabulous wireless communication system and wireless communication control method, Wireless Telecom Equipment and wireless communications method, and computer program, and communication equipment asynchronous transmission information wherein, and need not to be in continuous reception wait state.

Another object of the present invention provides fabulous wireless communication system and wireless communication control method, Wireless Telecom Equipment and wireless communications method, and computer program, wherein communication equipment can be carried out asynchronous wireless communication by RTS/CTS control, and need not to be in continuous reception wait state.

At above-mentioned purpose, the present invention is disclosed as follows.A first aspect of the present invention is asynchronous information transmission wireless communication system or the wireless communication control method that is used between a plurality of communication equipments, and wherein management information is regularly handled in the reception that exchange comprises himself communication equipment between Wireless Telecom Equipment; And sending the reception of describing in the source Wireless Telecom Equipment use and management information handles regularly to receiving target Wireless Telecom Equipment transmission information.

Whether the term of quoting here " system " is that the logic of a plurality of equipment functional module of appointed function (or be used to realize) is assembled, and be in for equipment or functional module and do not have special supposition in the single scope.

Here, management information comprises the timing information that is used to be provided with receive window, and comprises and be used to be provided with receive window, makes Wireless Telecom Equipment to carry out and receives the cycle information of handling.Management information also can comprise the device id information unique to each corresponding Wireless Telecom Equipment.

Each Wireless Telecom Equipment is when associate device id information when other Wireless Telecom Equipment receives management information, and in this way, a plurality of Wireless Telecom Equipments can be controlled to receive and handle regularly.

Therefore, according to wireless communication system or wireless communication control method based on first aspect present invention, can constitute wireless network, wherein each Wireless Telecom Equipment is checked the existence of other communication equipment by exchange of management information, and regularly carries out asynchronous communication according to the reception of describing in the management information.In this case, each Wireless Telecom Equipment can be directly with communicate by letter asynchronously, and need not to install the particular device that serves as control station.

In addition, according to wireless communication system or wireless communication control method based on first aspect present invention, each Wireless Telecom Equipment is with the reception timing of himself, and receive window and receiving cycle information prior notice are given other communication equipment, and uses this receive window to send information.In other words, each Wireless Telecom Equipment can asynchronous communication, and need not to be in continuous reception wait state, so allow receiving function to work with low power.

In addition, according to wireless communication system or wireless communication control method based on first aspect present invention, send information by the management information that received according to the past, Wireless Telecom Equipment can be carried out radio communication, and need not to be checked in advance the means (means) that transmission line uses, make and carry out message transmission with the quite short time.

In other words, according to wireless communication system or wireless communication control method based on first aspect present invention, can obtain to avoid the access control method of the conflict during the asynchronous wireless communication, detect the random access control method that communication contention aware is avoided in control and need not to use by carrier wave.

In wireless communication system or wireless communication control method based on first aspect present invention, each Wireless Telecom Equipment is regularly arranged receive window by skew, make that the reception processing cycle is not overlapping with the cycle of other communication equipment, so realized being not easy to cause the access control of the conflict between a plurality of Wireless Telecom Equipments.

And each Wireless Telecom Equipment can send the management information of himself according to each specific period, and management information can comprise the announcement period information that is used for sending to other Wireless Telecom Equipment management information.

In addition, each Wireless Telecom Equipment can response management information reception and check whether there is corresponding Wireless Telecom Equipment in the wireless network, and also can work as when in the end receiving management information is afterwards through the stipulated time (for example announcement period of stipulating in the management information), judge that Wireless Telecom Equipment no longer is present in the wireless network.

Particularly, by providing on determining time span not when Wireless Telecom Equipment receives the signal that contains identifier and timing information, judge the function that is connected and from memory, deletes this connection that no longer exists with this Wireless Telecom Equipment, can in the communication range of Wireless Telecom Equipment, realize being used to dispose the Radio Network System of autonomous wireless networks, and need not the strict difinition wireless network.

By setting up the management information exchange district so as between a plurality of communication equipments exchange of management information, also can realize to be effective to the access control method of a plurality of communication equipments synchronously with one another, and need not to install control station or the access point that serves as datum mark in the wireless network.

In addition, during the transmission of the service quality (QoS) that guarantees at needs, will resemble to notify this transmission that the QoS with assurance carries out for example keeping in the transmission, can easily realize having the radio communication of the QoS of assurance by transfer management information.

In addition, can whether exist with other communication equipment of this communication apparatus communication with notice, can know that demonstration is the structural area of the wireless network at center with this communication equipment by the management information that sends communication equipment.

The receive window of describing in the management information of using the receiving target Wireless Telecom Equipment sends in the RTS (request sends), transmission source Wireless Telecom Equipment receives CTS (clear to send) by response from corresponding receiving target Wireless Telecom Equipment connection is set, and can begin transmission information.

Therefore, according to wireless communication system or the wireless communication control method based on first aspect present invention, communication equipment can be carried out asynchronous wireless communication by the RTS/CTS access control, and need not to be in continuous reception wait state to detect the RTS signal.

By in the exchange of management information minimum required receive window being set respectively mutually, each Wireless Telecom Equipment is also carried out minimum required reception operation.Be different from prior art, do not need to be in continuous reception wait state, so realized low power consumption operation.Whether there is the information that is addressed to himself communication equipment because receive window only need detect, very short receive window can be set, make it possible to realize having the operation of very low-power consumption.

In addition, by corresponding receive window is set as required, can simplify receiving operation, even because during the ultrahigh speed wireless transmission, also needn't receive the decode all information that flow on the transmission line.

Can obtain to be addressed to the information of himself communication equipment, and need not to use the high speed processor that is used for being received in the information that the ultrahigh speed transmission sends.

Here,, send the source Wireless Telecom Equipment and receive the affirmation receive window of CTS and then use and confirm receive window by being provided for, can receive CTS from the receiving target Wireless Telecom Equipment in response to send RTS to the receiving target Wireless Telecom Equipment.Alternatively, the Wireless Telecom Equipment that receives RTS can return CTS by the receive window of describing in the management information of using transmission source Wireless Telecom Equipment.

In addition, in response to returning CTS to transmission source Wireless Telecom Equipment, the receiving target Wireless Telecom Equipment can be provided for the message pick-up window of the information that receives from transmission source Wireless Telecom Equipment, and the source of transmission Wireless Telecom Equipment can come transmission information by using the message pick-up window.Alternatively,, send the receive window of source Wireless Telecom Equipment, can send information by describing in the management information of using the receiving target Wireless Telecom Equipment in response to receiving the CTS that sends from the receiving target Wireless Telecom Equipment.

In addition, after message transmission is finished, can between the Wireless Telecom Equipment of transmission and receiver side, exchange confirmation of receipt.In this case, after transmission information, transmission source Wireless Telecom Equipment can be provided for receiving from the receiving target Wireless Telecom Equipment confirmation of receipt receive window of confirmation of receipt, and the receiving target Wireless Telecom Equipment also can send confirmation of receipt by using the confirmation of receipt receive window.Alternatively, receiving after the information that sends source Wireless Telecom Equipment transmission, the receive window of receiving target Wireless Telecom Equipment by describing in the management information of using transmission source Wireless Telecom Equipment can send confirmation of receipt.

A second aspect of the present invention provides and has been used for carrying out asynchronous information transmission wireless communication equipment by wireless network, comprising:

The receiving system that is used to the information that receives,

Be used to make the management information that receives from other Wireless Telecom Equipment to be associated with corresponding Wireless Telecom Equipment, and the management information storage device of management information,

The dispensing device that is used to the information that sends; With

Access control apparatus, the reception that is used for using the management information of receiving target radio communication to describe is handled the transmission of timing controlled receiving system and dispensing device and is received regularly.

A third aspect of the present invention provides and has been used for carrying out asynchronous information transmission wireless communication method by wireless network, comprises step:

Receive the management information of describing corresponding Wireless Telecom Equipment reception processing timing from other Wireless Telecom Equipment;

When the management information that will receive is associated with corresponding Wireless Telecom Equipment, store this management information; With

Handle regularly transmission information by the reception of describing in the management information of using the receiving target Wireless Telecom Equipment.

Here, management information contains and is useful on the timing information that the receive window that Wireless Telecom Equipment carry out to receive handles is set, and contains and be useful on the cycle information that receive window is set.Management information also can comprise for the unique device id information of corresponding Wireless Telecom Equipment.

According to based on the Wireless Telecom Equipment of second aspect present invention or based on the wireless communications method of third aspect present invention, the management information that receives from other Wireless Telecom Equipment is associated with device id information and storage, make and to determine as required that a plurality of Wireless Telecom Equipments execution receive the timing of handling, and promptly send the timing of information to each Wireless Telecom Equipment.

According to of the present invention second and the third aspect, send information by the management information that received according to the past, Wireless Telecom Equipment can be carried out radio communication, and need not to be checked in advance the means of transmission line use, makes with quite short time execution message transmission.

Particularly,, can realize fabulous, as can to avoid the conflict during asynchronous wireless communication access control method, detect the random access control method that control hazard is avoided and need not to use by carrier wave according to of the present invention second and the third aspect.

In addition, each Wireless Telecom Equipment can send the management information of himself according to each specific period, and management information also can comprise the announcement period information that is used for sending to other Wireless Telecom Equipment management information.In Wireless Telecom Equipment or wireless communications method based on third aspect present invention based on second aspect present invention, each Wireless Telecom Equipment can response management information reception and check whether there is corresponding Wireless Telecom Equipment in the wireless network, and also can work as when in the end receiving management information is afterwards through the stipulated time (for example announcement period of stipulating in the management information), judge that Wireless Telecom Equipment no longer is present in the wireless network.

In addition, by when sending information with reference to its management information, can easily realize having the radio communication of the QoS of assurance at Wireless Telecom Equipment, described Wireless Telecom Equipment provides prenotices, show as for example keeping in the transmission to have the management information transmission of the QoS of assurance.

Based on the Wireless Telecom Equipment of second aspect present invention or relate in the wireless communications method of third aspect present invention, along with the receive window of describing in the management information of using the receiving target Wireless Telecom Equipment sends RTS, transmission source Wireless Telecom Equipment can begin transmission information by in response to receiving CTS from corresponding receiving target Wireless Telecom Equipment connection being set.

Therefore, the receiving target Wireless Telecom Equipment can be carried out asynchronous wireless communication by the RTS/CTS access control, and need not to be in continuous reception wait state to detect the RTS signal.

Here,, send the source Wireless Telecom Equipment and receive the affirmation receive window of CTS and then use and confirm receive window by being provided for, can receive CTS from the receiving target Wireless Telecom Equipment in response to send RTS to the receiving target Wireless Telecom Equipment.

In addition, by the message pick-up window that uses the receiving target Wireless Telecom Equipment after returning CTS, to establish, send the source Wireless Telecom Equipment and can send information.Alternatively,, send the receive window of source Wireless Telecom Equipment, can send information by describing in the management information of using corresponding receiving target Wireless Telecom Equipment in response to receiving the CTS that sends from the receiving target Wireless Telecom Equipment.

In addition, after message transmission is finished, can between the Wireless Telecom Equipment of transmission and receiver side, exchange confirmation of receipt.In this case, after transmission information,, send the source Wireless Telecom Equipment and can send confirmation of receipt by being provided for receiving the confirmation of receipt receive window of confirmation of receipt from the receiving target Wireless Telecom Equipment.

In addition, a fourth aspect of the present invention is to be used for carrying out asynchronous information transmission wireless communication equipment by wireless network, comprising:

The management information generation device is used to produce the reception of describing himself equipment and handles management information regularly;

The receiving system that is used to the information that receives;

Be used to send the dispensing device of management information; With

Access control apparatus is used for the reception timing according to management information control receiving system, and the transmission of control dispensing device is regularly to send management information.

In addition, a fifth aspect of the present invention is to be used for carrying out asynchronous information transmission wireless communication equipment by wireless network, and comprises step:

Produce to describe the reception of himself equipment and handle management information regularly;

Send management information to other Wireless Telecom Equipment; With

Handle timing by the reception of describing in the use and management information and come reception information.

Other Wireless Telecom Equipment that receives this management information is associated with device id information with management information, and in memory management information, make corresponding Wireless Telecom Equipment can control regularly and handle to carry out to receive.

Therefore, according to based on the Wireless Telecom Equipment of fourth aspect present invention or based on the wireless communications method of fifth aspect present invention, each Wireless Telecom Equipment is checked the existence of miscellaneous equipment by exchange of management information, and regularly carry out asynchronous transmission according to the reception of describing in the management information, make to constitute wireless network.In this case, each Wireless Telecom Equipment can be each other directly with communicate by letter asynchronously, and need not to install the particular device that serves as control station.

In addition, by the receive window of describing in the management information of using prior reception, other Wireless Telecom Equipment can send information.Therefore, Wireless Telecom Equipment can be carried out asynchronous communication, and need not to be in continuous reception wait state, makes receiving function to work with low power.

In addition, send information by the management information according to the past reception, other Wireless Telecom Equipment can be carried out radio communication, and need not to be checked in advance the means of transmission line use, makes with quite short time execution message transmission.

Particularly, according to based on the Wireless Telecom Equipment of fourth aspect present invention or based on the wireless communications method of fifth aspect present invention, can obtain to avoid the access control method of the conflict during the asynchronous wireless communication, detect the random access control method of controlling communication contention aware and need not to use by carrier wave.

In addition, by when skew regularly, arranging receive window, make that the cycle of carrying out the reception processing on each Wireless Telecom Equipment is not overlapping with the cycle of other communication equipment, so can between a plurality of Wireless Telecom Equipments, realize being not easy to cause the access control of communication contention aware.

In addition, each Wireless Telecom Equipment can send the management information of himself according to each specified period, and management information also can comprise the announcement period information that is used for sending to other Wireless Telecom Equipment management information.

Other Wireless Telecom Equipment that receives management information can further be checked the existence of corresponding Wireless Telecom Equipment in the wireless network, and, can also judge no longer to have Wireless Telecom Equipment in the wireless network when after the receiving management information in the end during through the stipulated time (for example announcement period of stipulating in the management information).

By setting up the management information exchange district synchronously so as between a plurality of communication equipments exchange of management information, also can realize being effective to the access control method of a plurality of communication equipments, and need not to install control station or the access point that serves as datum mark in the wireless network.

During the transmission of the service quality (QoS) that guarantees at needs, will resemble to notify this transmission that the QoS with assurance carries out for example keeping in the transmission, can easily realize having the radio communication of the QoS of assurance by sending management information.

In addition, can whether exist with other communication equipment of this communication apparatus communication with notice, can know that demonstrating with this communication equipment is the range of structures of the wireless network at center by the management information that sends communication equipment.

In Wireless Telecom Equipment or wireless communications method based on fifth aspect present invention based on fourth aspect present invention, Wireless Telecom Equipment can receive RTS from other Wireless Telecom Equipment according to the receive window of describing in the management information, and can return CTS to the source of transmission Wireless Telecom Equipment in response to receiving RTS.As a result, set up connection with corresponding Wireless Telecom Equipment to begin transmission information.

Therefore, can carry out asynchronous wireless communication by the RTS/CTS access control, and need not to be in continuous reception wait state to detect the RTS signal.

By in the exchange of management information minimum required receive window being set respectively mutually, each Wireless Telecom Equipment is also carried out minimum required reception operation.Be different from prior art, do not need to be in continuous reception wait state, thereby allow low power consumption operation.Whether there is the information that is addressed to himself communication equipment because receive window only need detect, very short receive window can be set, make it possible to realize having the operation of very low-power consumption.

Here, in response to returning CTS to the source of transmission Wireless Telecom Equipment, Wireless Telecom Equipment can be provided for from sending the message pick-up window that the source Wireless Telecom Equipment receives information.

Receiving after the information that the transmission source sends, Wireless Telecom Equipment can send confirmation of receipt.

In addition, a sixth aspect of the present invention is the computer program of writing with computer-readable format, is used for carrying out on computer system wireless communication process, so that send information by the wireless network that is used for the asynchronous information transmission, comprises step:

From other Wireless Telecom Equipment receiving management information, described management information is described the reception of corresponding Wireless Telecom Equipment and is handled regularly;

When the management information that will receive is associated with corresponding Wireless Telecom Equipment, the management information that storage receives; With

In addition, a seventh aspect of the present invention is the computer program of writing with computer-readable format, is used for carrying out on computer system wireless communication process, so that send information by the wireless network that is used for the asynchronous information transmission, comprises step:

Send management information to other Wireless Telecom Equipment; With

The computer program of the present invention the 6th and the 7th aspect is defined by writing, being used for realizing in computer system with computer-readable format the computer program of predetermined processing.In other words, realize mutual effect, and can obtain the same effect in the wireless communications method with the present invention the 3rd and the 5th aspect by the computer program that the present invention the 6th and the 7th aspect are installed.

The embodiment of the invention of describing by reference the following drawings is appreciated that other purpose of the present invention, feature and advantage.

Description of drawings

The schematic diagram of Fig. 1 has illustrated the structure based on the asynchronous wireless telecom-munication of first embodiment of the invention;

Fig. 2 shows the reception example regularly of the communication equipment that setting can work on the wireless network based on first embodiment of the invention;

Fig. 3 shows based on first embodiment of the invention, according to the typical management information of specific notification cycle from the communication equipment transmission;

Fig. 4 shows the sequence example based on the message transmission between the communication equipment of first embodiment of the invention;

The schematic diagram of Fig. 5 has illustrated the example of the receive window of arranging to be distributed to communication equipment;

The module map of Fig. 6 shows the function based on first embodiment of the invention, the communication equipment 10 operated on asynchronous wireless network;

The sequential chart of Fig. 7 illustrates access control, is used for being provided with the management information exchange district and keeps transmission range on the asynchronous wireless network based on first embodiment of the invention;

The flow chart of Fig. 8 shows the operating process of communication equipment, this communication equipment can with based on other communication equipment on the wireless network of first embodiment of the invention directly with communicate by letter asynchronously;

Fig. 9 shows the example of the asynchronous transmission of prior art communication equipment;

The schematic diagram of Figure 10 has illustrated the structure based on the asynchronous wireless telecom-munication of second embodiment of the invention;

Figure 11 shows the example that window is set based on second embodiment of the invention, between the communication equipment that is used for the information that sends by asynchronous wireless network;

The schematic diagram of Figure 12 has illustrated based on second embodiment of the invention, information transmission sequence between the communication equipment of asynchronous wireless network;

The schematic diagram of Figure 13 has illustrated the structure of management information P;

The schematic diagram of Figure 14 has illustrated the structure of RTS (request sends);

The schematic diagram of Figure 15 has illustrated the structure of CTS (clear to send);

The schematic diagram of Figure 16 has illustrated the structure of transmission information S;

The schematic diagram of Figure 17 has illustrated the structure of confirmation of receipt T;

The module map of Figure 18 shows the functional structure based on second embodiment of the invention, the communication equipment 10-2 that works on asynchronous wireless network;

The flow chart of Figure 19 shows the operating process of communication equipment, this communication equipment can with based on other communication equipment on the wireless network of second embodiment of the invention directly with communicate by letter asynchronously; And

The flow chart of Figure 20 shows the modification example of the operating process of communication equipment, and this communication equipment can be carried out direct with asynchronous communicating by letter on based on the wireless network of second embodiment of the invention.

Embodiment

Describe embodiments of the invention with reference to the accompanying drawings in detail.

First embodiment

Fig. 1 schematically shows the wireless network of first embodiment of the invention.Each communication equipment in the wireless network of present embodiment can asynchronous transmission information.Certainly, the synchronizing information transmission also is applicable to the present invention.

In the example of accompanying drawing, communication equipment 1 to communication equipment 8 spatially distributes.Arrow in the accompanying drawing show each communication equipment can with other adjacent communication devices communicating.Communication equipment 3 can be directly and the communication range shown in the dotted line 13 in each

communication equipment

1,4 communicate by letter with 6.

Communication equipment 6 can be directly and the communication range shown in the dotted line 16 in each

communication equipment

3,5 communicate by letter with 7.

Communication equipment 7 can be directly and the communication range shown in the dotted line 17 in each

communication equipment

5,6 communicate by letter with 8.

Communication equipment can comprise for example communication adapter card or PC card, or the computer peripheral equipment of other structure.Communication equipment can be installed in the external connection apparatus such as personal computer or PDA (personal digital assistant), so that wireless transmission capability to be provided.

Each communication equipment in the present embodiment can be arranged on the announcement period of management information on the specific time interval, and send (or for example broadcasting) and describe information about the cycle that allows to receive, for example indicate the reception timing information that on himself communication equipment, begins the position of the information that receives, receive window information and receive window cycle information.Yet other communication equipment that receives management information is related with its reception numbering (receive number) with corresponding communication equipment, and stores corresponding reception regularly, receive window and receiving cycle.

Communication equipment in the wireless network can be checked its existence by the management information that receives other communication equipment in the network.In other words, each communication equipment passes through announcement period transmission (broadcasting) management information according to the rules, can notify other communication equipment with himself existence in wireless network.In addition, if there is such communication equipment, its announcement period (time) passes through (or another stipulated time pass through) but does not receive management information, can suppose that then this communication equipment no longer is positioned at wireless network.Therefore, constitute autonomous wireless networks by spatially being present in communication equipment in the network, can exchange of management information.

When communication terminal sends information each other in this class wireless network, the transmit leg communication equipment is sought the reception starting position of the communication equipment of the information that will receive, a kind of communication equipment in back can be according to the reception of describing in the management information of having stored regularly, receive window and receiving cycle receive information, and send relevant its information regularly.Yet, describe the access control in the asynchronous wireless network of present embodiment below in detail.

Fig. 2 shows the example that the reception of the communication equipment that can operate regularly is provided with on the wireless network of present embodiment.

As shown in drawings, the cycle that repeats to send management information is configured to announcement period.Announcement period is equivalent to the time interval before sending next management information.For example, one-period is configured to the interval from tens of milliseconds to some minutes.As mentioned above, send (broadcasting) management information by the announcement period according to each regulation, communication equipment can be with other communication equipment in the existence notice wireless network of himself.

" receive window " is arranged for the time of the information that receives.For example, receive window is arranged for returning the minimum required time of communication request and affirmation thereof.This receive window is set so as in the very small amount of time received signal.Receiving unit in the communication equipment judges whether decoded information is present in the receive window.If judge to have this information, then can be provided with, make and after receive window is closed, continue to receive next information.

Arrange receive window along time shaft, so as will to be used for beginning receiving operation " receiving regularly " be arranged on certain regularly on, thereby specify actual reception regularly.

" receiving cycle " or " receive window cycle " is set provides the position of next window, and then carry out to receive and handle according to receiving cycle with indication.

According to the communication device works condition, the receive window cycle can be configured to any desired cycle.Not this means when carrying out asynchronous communication for a long time the long receive window cycle can be set, the short receptor window period maybe can be set to realize not having the asynchronous communication of pressure.

Receive window and receive window cycle can be set avoiding the conflict between the communication equipment in the wireless network, and in this way, efficiently utilize wireless transmission link.

The example of Fig. 2 shows the independent setting of each parameter; Yet these can be configured to preset parameter.

Fig. 3 is the example of structure of management information that is used for sending according to each regulation announcement period the communication equipment of management information in the present embodiment.The required information of configuration asynchronous communication wireless network has been described in management information.

As shown in the figure, management information provides the field that wherein writes various information, comprises: about the communication equipment number information of the independent ID numbering of distributing to the communication equipment that is used to send management information; Indication is used to carry out the announcement period information in the cycle of management information notice; Indication is used to carry out the receive window information that receives the time of handling; The reception timing information of the time that is provided with in the notice receive window; Settle the receiving cycle information of the position of receive window with specify periodic.

Except that above-mentioned basic structure, management information can contain other project as required, comprises the reservation information of the notice that is used to keep transmission range; About other communication equipment, near being used to specify the information of addressable communication equipment; Be used to discern whether correct CRC (Cyclical Redundancy Check) sign indicating number of management information, or the like.

For example, (Q0S: during service quality) transmission, communication equipment can be put into the information transmitted of the QoS that is used to have assurance in management information, and (broadcasting) this information of transmission when needs have the communication quality of assurance.For example, reservation information field in the writing management information is set, can uses the QoS of reserved bandwidth and assurance to carry out transfer of data at corresponding communication equipment by keeping transmission range.

By in management information, describing information about other addressable communication equipment, the miscellaneous equipment that receives management information can be discerned the wireless communications environment of corresponding communication equipment, and promptly announcement period sends the structure of the asynchronous wireless network that corresponding communication equipment disposed of (broadcasting) its management information according to the rules.

These declarative descriptions management information be set to the example of individual parameter.Yet can delete unwanted parameter as required.In addition, must add, then can add these parameters as required with parameter as management information if exist.

As mentioned above, in the asynchronous wireless network of present embodiment, by sending (broadcasting) management information as shown in Figure 3 according to each regulation announcement period, each communication equipment can be notified other communication equipment with its existence in wireless network.By prorate for broadcasting in several times once in several thousand times broadcasting announcement period once come broadcast control information, the frequency that sends transmission can keep lower, and can reduce power consumption.

For transmission information, be used for the receive window that the communication equipment of the information that sends must use the management information of the communication equipment of the information that will receive to stipulate.Use regulation receive window has shortened the message pick-up that is provided with in the receive window and the communication equipment in receive window cycle greatly to be handled.Use the regulation receive window also allow to send communication equipment regulation regularly ending message send, and reduced and obtained synchronous processing load.

Receive window and receive window cycle are provided with does not have communication contention aware to occur so that communication in wireless networks equipment is middle by carrying out, and can efficiently utilize wireless transmission link.

When whether communication equipment sends management information as shown in Figure 3 and detect other addressable communication equipment when existing, each communication equipment can know that demonstration is himself to be the scope of the wireless network architecture at center.

Fig. 4 shows the example of the information transmission sequence that the communication equipment of present embodiment carries out.Example in the accompanying drawing shows and serves as the source connection device 41 that asynchronous information sends the source, serve as the transmission sources traffic equipment 42 that radio communication sends the source, serve as the receiving target communication equipment 43 of radio communication receiving target and serve as information exchange sequence in the middle of the target connection device 44 of asynchronous information receiving target.

At first, notify (T1) management information from receiving target communication equipment 43 to sending sources traffic equipment 42.Therefore, sending sources traffic equipment 42 can detect receiving target communication equipment 43 and be positioned at the communication range of himself.Send sources traffic equipment 42 and also can notify its management information (not shown in the accompanying drawing), make the receive window (not shown in the accompanying drawing) that sends sources traffic equipment 42 can be set on receiving target communication equipment 43 to receiving target communication equipment 43.

Is set, i.e. receive window the time of reception information in receiving target communication equipment 43.From the management information of receiving target communication equipment 43 notices, also contain the information that relates to receive window, receive window for example, receive timing and receive window cycle, the transmission sources traffic equipment 42 that therefore receives information in advance can be known the timing of receive window W1 to W3.

Here, when transmission information when source connection device 41 arrives (T2) and sends sources traffic equipment 42, send timing and transmission information (T3) that sources traffic equipment 42 uses receive window W2, described receive window W2 be on the receiving target communication equipment 43 receive window regularly in immediate receive window.

At this moment, receiving target communication equipment 43 is carried out according to the cycle of receive window W2 and is received operation, therefore can receive message transmission.

Receive window is configured to basically with extremely short time received signal.Yet, judge in the receive window whether have decoded information.When judging this information of existence,, still can continue follow-up reception and handle (not shown in the accompanying drawing) even after receive window disappears.

When message transmission 403 was correctly received, receiving target communication equipment 43 transmitted the information (T4) that receives and arrives target connection device 44.

In this way, receiving target communication equipment 43 receives information according to receive window that is provided with in advance and receive window cycle.Therefore, compare with the prior art that receives information, can shorten receiving the processing time and reducing power consumption greatly with being in wait state all the time.Only, also can finish to send the processing on the sources traffic equipment 42 by at the regulation periodically sending information.

In the asynchronous wireless network of present embodiment, by sending management information according to designated period, each communication equipment can be notified other communication equipment with its existence in wireless network, described management information contains reception timing information, receive window information and the receiving cycle information of the message pick-up starting position of indicating himself.Each communication equipment is arranged on announcement period on the stipulated time section, so that send management information.Yet when a plurality of communication equipments are provided with its oneself corresponding timing, preferably receive window and receive window cycle are arranged to mutually and do not conflict.

The schematic diagram of Fig. 5 has illustrated an example, wherein arranges the receive window of each communication equipment, makes to be present in when neighbouring when a plurality of communication equipments, and receive window and receive window cycle do not conflict mutually.

Here, notify other communication equipment by sending management information M1 with himself existence in wireless network as the communication equipment 1 on basis.Communication equipment 1 also according to the reception of appointment among this management information M1 regularly and receive window cycle receive window W11 to W14 that set up himself, that be used to the information that receives.

In the present embodiment, the communication equipment 1 that at first sends management information in asynchronous wireless network is provided with management information exchange district C1, makes operation along with near other communication equipment being present in carries out together.Set up this management information exchange district C1 according to the announcement period of each regulation, and after sending management information M1, set up management information exchange district C2 next time.Then, the cycle of utilization in management information exchange district C1 receives the management information from other communication equipment, and wherein the management information of himself is not sent out in this cycle.

When receiving the management information M1 of communication equipment 1, communication equipment 2 sends the management information M2 of himself.Communication equipment 2 is with other communication equipment in the existence notice wireless network of himself.Communication equipment 2 is set up the receive window W21 to W24 that is used to the information that receives according to the reception timing and the receive window cycle of appointment among this management information M2.

In the example shown in Fig. 5, the position of the management information exchange district C1 that communication equipment 2 is provided with according to communication equipment 1 is provided for sending the timing of the management information of himself, makes and does not regularly conflict with the management information notice of communication equipment 1.Then, by the management information of the cycle reception of utilization in management information exchange district C1 from other communication equipment, wherein the management information of himself is not sent out in this cycle.Also set up receive window W21 to W24, make and do not conflict with the receive window of communication equipment 1.

Similarly, communication equipment 3 sends the management information M3 of himself, with other communication equipment notified in the wireless network that exists with himself.Communication equipment 3 is also set up receive window W31 to W34 according to the reception timing and the receive window cycle of this management information M3 appointment.

In the example shown in Fig. 5, the position of the management information exchange district C1 that communication equipment 3 is provided with according to communication equipment 1 is provided for sending the timing of the management information of himself, makes and does not regularly conflict with the management information notice of communication equipment 1 and communication equipment 2.Then, communication equipment 2 is by the management information of the cycle reception of utilization in management information exchange district C1 from other communication equipment, and wherein the management information of himself is not sent out in this cycle.Also set up receive window W31 to W34, make and do not conflict with the receive window of communication equipment 1 and communication equipment 2.

Similarly, communication equipment 4 sends the management information M4 of himself, with other communication equipment notified in the wireless network that exists with himself.Communication equipment 4 is also set up receive window W41 to W44 according to the reception timing and the receive window cycle of this management information M4 appointment.

In the example shown in Fig. 5, the position of the management information exchange district C1 that communication equipment 4 is provided with according to communication equipment 1 is provided for sending the timing of the management information of himself, make not and communication equipment 1, the regularly conflict of management information notice of communication equipment 2 and communication equipment 3.Then, communication equipment 4 is by the management information of the cycle reception of utilization in management information exchange district C1 from other communication equipment, and wherein the management information of himself is not sent out in this cycle.Also set up receive window W41 to W44, make not and communication equipment 1, the receive window conflict of communication equipment 2 and communication equipment 3.

The module map of Fig. 6 shows the function of the communication equipment 10 in the asynchronous wireless network of present embodiment.As shown in the figure, communication equipment 10 comprises interface 11, memory buffer 12, radio transmitters 13, antenna 14, information stores parts 15, CPU 16, wireless receiver 17, time measurement parts 18 and access controller 19.Yet other structure also can be used to realize with accompanying drawing in the structure identical functions, so the present invention is not limited to this structure.

Communication equipment 10 also can be under the overall control of CPU 16 and other Wireless Telecom Equipment asynchronous communication.CPU 16 is microprocessors, and the sequence of operation order (program code) by storing in the implementation information memory unit 15, the operation of equipment during the control asynchronous wireless communication.

The required parameter of the access control of asynchronous wireless communication produces in CPU 16 in the present embodiment, be stored as management information in memory buffer 12, and those parameters is stored in also in the access controller 19.

Management information comprises the relevant communication equipment number information of distributing to the independent identification number of communication equipment 10; Be used for Reports Administration notification of information cycle information; Indication is used to carry out the receive window information that receives the time of handling; The reception timing information of the time that is provided with in the notice receive window; Settle the receiving cycle information (referring to Fig. 3) of the position of receive window with specify periodic.

Access controller 19 sends and the message pick-up operation according to the information of regulating communication in wireless networks equipment 10 from the temporal information of management information time and measurement component 18.At first, when transmission regularly arrived, access controller 19 sent instruction to radio transmitters 13.Here said transmission is the receive window of settling in the communication equipment of receiving target regularly.Response is from the instruction of access controller 19, radio transmitters 13 then from antenna 14 transmit buffer memories 12 the transmission information of storage with as wireless signal.

According to management information with from the temporal information of time measurement parts 18, access controller 19 sends instruction to wireless receiver 17 receiving when regularly arriving.Wireless receiver 17 then receives the wireless signal of catching by antenna 14.

When wireless receiver 17 in the management information exchange district when other communication equipment receives management information, it provides this management information to CPU 16.Then, CPU 16 suitably stores each parameter of describing in the management information in the information stores parts 15.Then, when sending information to this transmission sources traffic equipment, use this management information.

The information that receives when wireless receiver 17 is that this information is stored in the memory buffer 12 when being addressed to the transmission information of Wireless Telecom Equipment 10 itself.In memory buffer 12, this reception information is by reconstruct and offer continuous interface 11 (not shown in the accompanying drawing).If the information that receives is any other information, then abandon this information.

If any information that provides from associated devices (not shown the accompanying drawing) is provided, interface 11 is stored this transmission information in memory buffer 12, and notifies CPU 16 with the information of relevant wireless transmission target.Then, that CPU 16 received from other communication equipment with reference to the past, be stored in other parameter the information stores parts 15, and send instruction to handle transmission to access controller 19.

Start this serial message transmission operation according to instruction, and access controller 19 is operated according to the timing of time measurement parts 18 from CPU 16.

Then, the announcement period information in the CPU 16 reference information memory units 15 in himself management information of storage, and indication access controller 19 in management information changes the district according to the transmission timed sending management information group of himself management information.In response to this, access controller 19 is followed according to the timing information from time measurement parts 18 and is detected the arrival that sends timing, and indicates radio transmitters 13 to send management information according to the announcement period of each regulation.Radio transmitters 13 then 12 reads the management information of himself from the memory buffer, and sends these management information by antenna 14.

When the information that provides by interface 11 was provided, central processing unit 16 is interim storage transmission information in memory buffer 12.Central processing unit 16 also reads the management information of receiving target communication equipment so that obtain receive window information from information stores parts 15, receive timing information and receiving cycle information (as required), and then send the instruction that is used to send processing to access controller 19.In response to this, access controller 19 detects according to the timing information from time measurement parts 18 and sends arrival regularly, and indicates radio transmitters 13 to send information according to the receive window of receiving target communication equipment.Radio transmitters 13 then 12 reads transmission information from the memory buffer, and sends these information by antenna 14.

Then, the receive window information in the CPU 16 reference information memory units 15 in himself management information of storage receives timing information and reception notification information, and indication access controller 19 is carried out to receive and handled.Access controller 19 detects according to the timing information from time measurement parts 18 and receives arrival regularly, so that set up receive window according to the receive window cycle of each regulation, and indication wireless receiver 17 reception information.Wireless receiver 17 is then by antenna 14 reception information, and the information that storage receives in memory buffer 12.Judge in the receive window and whether have decoded information.When judging this information of existence,, receive to handle and still proceed even after receive window disappears.

The equipment that link to each other by interface 11 are the messaging devices such as personal computer or PDA.This category information treatment facility does not have radio communication function basically.Yet,, can send the data of handling in the master unit by wireless transmission, and can receive transmission information from miscellaneous equipment by connecting communication equipment as shown in Figure 6.

When needs have the communication quality (QoS: during service quality) transmission of assurance, keep transmission range and be provided with in the reservation information field that can be written in the management information, make communication equipment to send data (referring to description and Fig. 3 of front) to corresponding communication equipment by the QoS that uses reserved bandwidth and assurance.Describe the time management of the access control in the asynchronous network of present embodiment below with reference to Fig. 7, wherein be provided with the management information exchange district and kept transmission range.

The example of Fig. 7 shows the setting that Wireless Telecom Equipment sends management information management information exchange district afterwards.In this case, near communication equipment can obtain the relevant notice that has received management information in the management information exchange district.

When near other communication equipment detects the management information exchange district and has been set up, use this management information exchange district to send management information.In this way, the communication equipment that can obtain being provided with its management information exchange district and be positioned near other communication equipment exchange message.

When communication equipment 10 must according to rule at interval (cycle) should the reservation transmission range be set in advance according to the quantity of the data that will send when himself equipment sends information.

Keep near the communication equipment of management of information information notice by containing this, near other communication equipment those are positioned at can be understood the periodical information transmission, i.e. reserved bandwidth transmission meeting is carried out in asynchronous wireless telecom-munication.

Fig. 8 is the flow chart of the operating process of communication equipment 10, and described communication equipment 10 can be carried out direct asynchronous communication with other communication equipment in the wireless network of present embodiment.In the actual realization of this sequence of operation, central processing unit 16 is carried out stored program code in the information stores parts 15.Describe the operation of the direct asynchronous communication in the present embodiment wireless network in detail below with reference to this flow chart.

At first, Wireless Telecom Equipment 10 is provided with such as announcement period, and receive window receives regularly and the access control parameter (step S1) of receiving cycle.These access control parameters are stored in the information stores parts 15.

Then, Wireless Telecom Equipment 10 judges whether the timing of himself arrives (step S2).Access control parameter according to step S1 is provided with the transmission timing of determining management information.Use and management information exchange district is provided with the transmission timing of management information, makes not clash mutually with other communication equipment.

When the transmission of management information had regularly arrived, operation was shifted from step S2 " being ", and carries out step S3.In step S3, obtain the numbering and the access control parameter of himself equipment, configuration management information (referring to Fig. 3), and in memory buffer 12 interim this information of storage.Then, radio transmitters 13 12 reads management information from the memory buffer, and sends (broadcasting) management information (step S4) near Wireless Telecom Equipment.After sending management information, operation turns back to step S2.In this way, communication equipment 10 is with near other Wireless Telecom Equipment himself existence notice in wireless network.

On the other hand, if judge that at step S2 the transmission of himself management information does not regularly arrive, and then judges once more at step S5 whether the reception of himself regularly arrives.When step S1 is provided with the access control parameter according to receive window information, receive timing information, the receive window cycle information determines that this receives regularly.Make conflict each other of communication equipment in the wireless network by receive window and receive window cycle be set, can efficiently use transmission line.

When receiving regularly when arriving along with the information that is addressed to himself communication equipment, operation is carried out step S6 from " being " breakout of step S5, and carries out message pick-up and handle.Similarly, even in the management information exchange district that is provided with respectively, also carry out this and receive processing.

Then, judge the management information (step S7) that whether receives other communication equipment.If judge the management information that receives other communication equipment, then analyze this management information, register the access control parameter (step S8) of corresponding communication equipment, and add described access control parameter with as can with the communication equipment (step S9) of himself devices communicating.The registration of access control parameter here, is equivalent to management information in information stores parts 15.Then operation turns back to step S2.

By from other communication equipment receiving management information, communication equipment 10 can be checked its existence in asynchronous wireless network.In other words, by wherein exchanging the communication equipment structure wireless network that exists in the space of its management information mutually.

On the other hand, when judging that when not receiving management information, step S10 is carried out in operation, and judge whether receive the information that is addressed to himself communication equipment.Then, only under the situation of the information of receiving, carry out message pick-up and handle (step S11).After receiving processing, operation turning back to step S2.

Communication equipment 10 is carried out in receive window according to the access parameter control setting of step S1 and is received operation (referring to Fig. 2).This receive window is configured to extremely short time received signal.Judge in the receive window and whether have decoded information.When judging this information of existence,, still can continue to receive and handle with reception information even after receive window is closed.

When judge receiving at step S5 when regularly not arriving, also judge the message transmission request that whether exists from the external equipment that links to each other by interface 11 (for example, such as personal computer or PDA information terminal) at step S12.

Here, when judgement needs message transmission, the type of given transmission information, and judge whether need independent reservation transmission (step S13).Then, reservation transmission range (step S14) only is set as required under the situation of needs reservation transmission.When not receiving the message transmission request, operation turns back to step S2.

Then, obtain the information of the destination address of transmission information, and judge whether the access control parameter of corresponding target communication device has been stored in (step S15) in the information stores parts 15.In other words, whether judge from the communication equipment of this destination address and receive management information.

If corresponding management information is registered, then operation is carried out step S16 to obtain such as receive window information the access control parameter of reception timing information and receive window cycle information, and the reception timing on the communication equipment of calculating destination address.

Operation is in wait state (step 17), up to regularly (in other words, immediate window period) arrival of the reception of calculating, and follows transmission information (step 18).After transmission, operation turns back to step S2.

When determining not register corresponding target communication device at step S15, operation " is denied that " breakout is transferred to step S19 from the step that comes into force.In this step, can not carry out the advisory of message transmission and pass through the equipment that interface 11 links to each other.Then operation turns back to step S2.

As mentioned above, by wherein exchanging the communication equipment structure wireless network that exists in the space of its management information mutually.Although not shown among Fig. 8, yet can carry out treatment step to determine that this communication equipment no longer is present in the wireless network when having passed through its announcement period (or having passed through another specified period) after the last management information reception at communication equipment.Then, also can from information stores parts 15, delete the management information that no longer to confirm the communication equipment of its existence.

For the message transmission operation with the Wireless Telecom Equipment of present embodiment compares, Fig. 9 shows the example of the asynchronous wireless transmission that the random access control of the carrier detecting method that uses the prior art Wireless Telecom Equipment carried out.In the example of this legend, carry out asynchronous transmission by 4 equipment that comprise communication equipment 1 to 4.

Because handling except sending constantly to carry out to receive the information sending area SA1 of information and the All Ranges the information sending area SA5 to other communication equipment from himself communication equipment, communication equipment 1 has high power consumption.All information that send from other communication equipment must be received, and the operation of the information that is addressed to itself, the therefore CPU that need have high throughput need be sorted out.

Communication equipment 2 also must constantly be carried out except sending the information sending area SA2 of information and the reception in the zone the information sending area SA6 is handled from himself communication equipment to other communication equipment.All information that send from other communication equipment must be received, and the operation of the information that is addressed to itself need be sorted out.

Communication equipment 3 also must constantly be carried out except sending the information sending area SA3 of information and the reception in the zone the information sending area SA7 is handled from himself communication equipment to other communication equipment.All information that send from other communication equipment must be received, and the operation of the information that is addressed to itself need be sorted out.

Communication equipment 4 also must constantly be carried out except sending the information sending area SA4 of information and the reception in the zone the information sending area SA8 is handled from himself communication equipment to other communication equipment.All information that send from other communication equipment must be received, and the operation of the information that is addressed to itself need be sorted out.

Here obviously be to be understood that, unless communication equipment is determined the existence of all other communication equipments when carrying out access control for example shown in Figure 9, otherwise very high probability is arranged with overlapping from the message transmission of another communication equipment and lead to a conflict from the message transmission of communication equipment.

Second embodiment

The schematic diagram of Figure 10 has illustrated the structure of the asynchronous wireless network of second embodiment of the invention.

The example of the wireless network that uses among this figure has 6 communication equipments 1 to 6.More specifically, wireless network comprises the communication range 13 of communication equipment 3.Be positioned near other communication equipment of communication apparatus communication scope and also can exist, and can constitute wireless network automatically.

Other communication equipment in the communication range 13 can receive the management information that sends from communication equipment 3, and receives the information that sends from other communication equipment.This management information comprises the reception timing information and the receive window information (describing later on) of the message pick-up starting position of containing designated communication equipment.Communication equipment 3 can be notified other communication equipment with its existence in wireless network by sending (broadcasting) himself management information.By the management information of received communication equipment 3, other communication equipment can be verified the existence of communication equipment 3 in wireless network.

Wireless device can comprise for example wireless adapter card or PC card, or the computer peripheral equipment of other structure.Communication equipment can be installed in the external connection apparatus such as personal computer or PDA (personal digital assistant), so that wireless transmission capability to be provided.

Figure 11 shows the example that the window on the communication equipment that the asynchronous wireless network that is used for by present embodiment sends information is provided with.

Communication equipment on the message pick-up target will ask receive window to be arranged in the timing of prior setting.This receiving target communication equipment also sends (broadcasting) in advance and contains receive window management of information information.

On the other hand, send sources traffic equipment, and know the request receive window of receiving target communication equipment in advance from receiving target communication equipment receiving management information.When the message transmission request took place, this sent sources traffic equipment and uses the request receive window of receiving target equipment to send communication request (RTS: request sends) to the receiving target communication equipment.

After sending RTS, send sources traffic equipment and the affirmation receive window is set immediately so that confirm (CTS: clear to send), and then enter wait state from receiving target equipment received communication.

In response to receiving RTS from sending sources traffic equipment, the receiving target communication equipment returns CTS.In addition, receiving target equipment is provided for the message pick-up window of the information that receives, and then waits for from the message transmission that sends sources traffic equipment.

In response to receiving CTS, send sources traffic equipment and send information from the receiving target communication equipment.The receiving target communication equipment then uses the message pick-up window that sets in advance to receive message transmission.

When after message transmission, needing to exchange confirmation of receipt, send sources traffic equipment confirmation of receipt window T_Window can be set, and confirmation of receipt T also can be transmitted back to the sources traffic equipment that sends from the receiving target communication equipment.

The schematic diagram of Figure 12 has illustrated the information transmission sequence between the communication equipment on the asynchronous network of present embodiment.Example in the accompanying drawing shows the source connection device 31 in the transmission source of serving as the asynchronous information that will send, serve as the transmission sources traffic equipment 32 that radio communication sends the source, serve as the receiving target communication equipment 33 of radio communication receiving target and serve as information exchange sequence in the middle of the target connection device 34 of asynchronous information receiving target.

In order to realize message transmission, the management information P notice with receiving target communication equipment 33 in the wireless network sends sources traffic equipment 32 in advance.To send management information (not shown in the accompanying drawing) the notice receiving target communication equipment 33 of sources traffic equipment 32 in the same manner.

The management information P of receiving target equipment 33 contains the receiving target equipment 33 middle request receive window Q_Window 331,332 that are provided with own, the timing of 334....Also can be defined in this information of the middle exchange of inherent communication equipment of time cycle of repetition.The transmission sources traffic equipment 32 that receives management information P can be known the timing of request receive window Q_Window 331,332,334 in advance.

The source connection device 31 of transmission information (for example DVD player) is connected to the sources traffic equipment 32 that sends by interface.When transmission information by when sending sources traffic equipment 31 and be sent to receiving target communication equipment 33, the timing of immediate request receive window Q_Window 332 is used to send RTS, and is provided for the affirmation receive window R_Window 321 that received communication is confirmed CTS afterwards immediately.

If receiving target communication equipment 33 receives RTS on request receive window (being provided with by communication equipment 33), then respond RTS and CTS is set, and configuration information receive window S_Window 333 is so that receive the information that sends from the communication request source.

When sending sources traffic equipment 32 reception CTS, it uses message pick-up window S_Window 333 to receiving target communication equipment 33 transmission information.

When after message transmission, needing to exchange confirmation of receipt, send sources traffic equipment 32 confirmation of receipt window T_Window 322 is set.Also can confirmation of receipt T be transmitted back to the sources traffic equipment 32 that sends from sending sources traffic equipment 33.

For example, receiving target communication equipment 33 is connected to the target connection device 34 that is used to show transmission information (or with some other form use information), for example display by interface.By the information that receives from transmission sources traffic equipment 32 to 34 outputs of target connection device, receiving target equipment 33 is finished information transmission sequence.

In addition, in case the sequence that constitutes by RTS and CTS has guaranteed the safety of the connection between the communication equipment 32 and 33, in the later RTS/CTS sequence of this point, can continue message transmission omitting.

Figure 13 shows the structure of management information P.Except the receive window of notifying himself, communication equipment sends this management information to be used to constitute wireless network.

This management information comprises the field that wherein writes various information, comprises: indication is suitable for the communication equipment information of the device numbering of Wireless Telecom Equipment; About management information, be used to indicate the announcement period information of management information announcement period; The reception request window information that contains the parameter that is useful on the request of reception; With about communications status, be used for the communication equipment information of determining which communication equipment can be accessed.

Request receive window information contains for example timing and cycle, is used to receive window is set so that receive the information of RTS from other communication equipment.What therefore, other communication equipment that receives this management information can be known this communication equipment in advance is used to receive the timing that is provided with on the receive window of RTS.

Information about other addressable communication equipment also can be described in management information.In this case, the miscellaneous equipment that receives management information is appreciated that the wireless communications environment of corresponding communication equipment, and promptly announcement period sends the structure of the asynchronous wireless network that corresponding communication equipment disposed of (broadcasting) its management information according to the rules.

Except above-mentioned basic structure, also can be as required on the receiving target communication equipment, add the management information that has out of Memory or be used for detecting CRC (Cyclical Redundancy Check) sign indicating number whether management information exist mistake.

When communication equipment sent (broadcasting) management information according to the management information announcement period that is provided with in advance, other communication equipment can periodically be confirmed the existence of this communication equipment.

Other communication equipment can suppose that its announcement period disappears but the communication equipment that do not receive its management information may no longer be present in the wireless network.This allows to constitute the wireless network that is present in a communication equipment in the zone on the space, wherein in described zone, can exchange its management information each other.

Certainly, communication equipment does not need periodically to send all the time management information, and can remove such communication equipment one by one from network configuration, wherein for this communication equipment, has passed through official hour after last receiving management information.

The schematic diagram of Figure 14 has illustrated the structure of RTS (request sends).By sending RTS, send the message pick-up window that sources traffic equipment can obtain the receiving target communication equipment to the receiving target communication equipment.

The field that this RTS comprises has: be used to indicate the communication request in communication request source to send source device information; Be used to indicate the communication request receiving target facility information of communication request receiving target; The communication transmission information that relates to the transmission during the practical communication; The communications parameter information that for example needs in communication, described communication for example are used for exchanging confirmation of receipt after finishing communication; Wherein write the CRC sign indicating number so that on the receiving target communication equipment, detect the field that whether has mistake in the communication request information.

The schematic diagram of Figure 15 has illustrated the structure of CTS (clear to send).When the communication equipment on the receiving target receives RTS (request sends) and accepts this request, its communication equipment loopback CTS on the transmission source.

This CTS comprises the field that wherein writes various information, comprises: be used to indicate the communication acknowledgement in communication acknowledgement source to send source device information; Be used to indicate the communication acknowledgement receiving target facility information of communication acknowledgement receiving target; The communication transmission information that relates to the transmission during the practical communication; The communications parameter information that for example needs in communication, described communication for example are used for exchanging confirmation of receipt after finishing communication; On receiving target equipment, detect the CRC coding whether communication acknowledgement information exists mistake with being used for.

Figure 16 schematic diagram illustrated and be sent out the transmission information S that sources traffic equipment sends to the receiving target communication equipment.This transmission information S is included in the communication data information (pay(useful) load) of actual use in the communication and is used for detecting the CRC coding of the transmission error of communication data information on receiving target equipment.

The schematic diagram of Figure 17 has illustrated confirmation of receipt T.After the reception of finishing transmission information S, as required confirmation of receipt T is transmitted back to the sources traffic equipment that sends.This confirmation of receipt T comprise relevant actual reception data information and be used on receiving target equipment detecting the CRC coding whether confirmation of receipt information exists mistake.

The module map of Figure 18 shows the functional structure of the communication equipment 10-2 that can operate on the asynchronous wireless network of present embodiment.As shown in the figure, this communication equipment 10-2 comprises interface 11, memory buffer 12, radio transmitters 13, antenna 14, information stores parts 15, CPU 16, wireless receiver 17, time measurement parts 18 and access controller 19.Yet other structure also can be used to realize with accompanying drawing in the structure identical functions, so the present invention is not limited to this structure.

Communication equipment 10-2 also can be under the overall control of CPU 16 and other communication equipment asynchronous communication.For example, CPU 16 can comprise microprocessor, and by carrying out the operation of equipment during asynchronous communication is controlled in the sequence of operation order (program code) of storing in the information stores parts 15.

The required parameter of the access control of asynchronous communication produces in CPU 16 in the present embodiment, and is stored as management information in memory buffer 12.These parameters also are stored in the access controller 19.

Management information comprises communication equipment information, and indication is as the device numbering that communication equipment 10 unique numberings are distributed; Announcement period information about management information, indication management information announcement period; Be kept for the request receive window information of the parameter of the request that receives; Indication is used to discern the communication equipment information (referring to Figure 13) of the communication capacity of addressable communication equipment.Except above-mentioned elementary cell, can also be as required on receiving target equipment, add and be used for detecting the CRC coding whether communication acknowledgement information exists mistake, and out of Memory.

Access controller 19 is according to message transmission and the message pick-up operation of regulating communication in wireless networks equipment 10 from the temporal information and the management information of time measurement parts 18.At first, when transmission regularly arrived, access controller 19 sent instruction to radio transmitters 13.Response is from the instruction of access controller 19, radio transmitters 13 then from antenna 14 transmit buffer memories 12 canned data with as wireless signal.

According to temporal information and the management information from time measurement parts 18, access controller 19 also sends instruction to wireless receiver 17 when reception regularly arrives.Wireless receiver 17 then receives the wireless signal of catching by antenna 14.

If any information that provides from associated devices (not shown the accompanying drawing) is provided on the interface 11, interface 11 is stored this transmission information in memory buffer 12, and with the information notice CPU 16 of the transmission target of relevant this information.Then, that CPU 16 received from other communication equipment with reference to the past, be stored in other parameter the information stores parts 15, and send instruction to handle transmission to access controller 19.

Start this message transmission operation according to instruction, and access controller 19 is operated according to the timing of time measurement parts 18 from CPU 16.

Then, the announcement period information in the CPU 16 reference information memory units 15 in himself management information of storage, and indication access controller 19 in the management information exchange district according to the transmission timed sending management information group of himself management information.In response to this instruction, access controller 19 is followed according to the temporal information from time measurement parts 18 and is detected transmission arrival regularly, and indicates radio transmitters 13 to send management information according to the announcement period of each regulation.Radio transmitters 13 then 12 reads the management information of himself from the memory buffer, and sends these management information by antenna 14.

When wireless receiver 17 when other communication equipment receives management information the management information exchange district, this management information is provided for CPU 16.Then, CPU 16 suitably stores each parameter of describing in this management information in the information stores parts 15.When sending RTS to transmission sources traffic equipment, use and management information.

When the information that provides by interface 11 was provided, CPU 16 is interim storage transmission information in memory stores buffering area 12.CPU 16 also reads the management information of receiving target communication equipment from information stores parts 15, obtain request receive window information, and indication access controller 19 sends RTS.Then, access controller 19 bases detect the arrival that sends timing from the temporal information of time measurement parts 18, and the request receive window of communication equipment synchronously sends information on indication radio transmitters 13 and the receiving target.Radio transmitters 13 then sends RTS by antenna 14.

After sending RTS, CPU 16 indicates access controller 19 that the affirmation receive window is set so that receive CTS from the receiving target communication equipment immediately.Access controller 19 is provided with the affirmation receive window, detects according to the temporal information from time measurement parts 18 and receives arrival regularly, and indicate wireless receiver 17 to carry out to receive and handle.

When wireless receiver 17 is being confirmed to receive in the receive window from CTS that the receiving target communication equipment sends, CPU 16 these CTS of decoding, and indication radio transmitters 13 sends the transmission information.In response to this instruction, radio transmitters 13 12 reads transmission information from the memory buffer, and sends these information by antenna 14.

When needing to exchange confirmation of receipt after transmission information, CPU 16 indicates access controller 19 that the confirmation of receipt receive window is set after the end of transmission.In response to this instruction, access controller 19 is provided with the confirmation of receipt receive window, detect according to the temporal information from time measurement parts 18 and receive arrival regularly, and indication wireless receiver 17 receives confirmation of receipt.

CPU 16 indication access controllers 19 are provided with the request receive window according to the access control parameter that is provided with for central processing unit 16.In response, access controller 19 receives arrival regularly according to the temporal information detection from time measurement parts 18, and indication wireless receiver 17 synchronously receives information with himself asking receive window.

When wireless receiver 17 by the request receive window when another communication equipment receives RTS, CPU 16 these RTS of decoding, and indication radio transmitters 13 is to sending sources traffic equipment loopback CTS.CPU 16 is also indicated access controller 19 configuration information receive windows.Access controller 19 configuration information receive windows detect the arrival that receives timing according to the temporal information from time measurement parts 18, and indication wireless receiver 17 synchronously receives information with the message pick-up window.

When wireless receiver 17 received the transmission information that is addressed to himself Wireless Telecom Equipment 10, this information was stored in the memory buffer 12.This reception information of memory buffer 12 reconstruct, and provide this information to the equipment (not shown in the accompanying drawing) that connects by interface 11.Abandon any other information that is received.

When needing to exchange confirmation of receipt after transmission information, CPU 16 is finished by the message pick-up window after sending sources traffic equipment reception transmission information, and indication radio transmitters 13 sends confirmations of receipt.

The equipment that link to each other by interface 11 are the messaging devices such as personal computer or PDA.This category information treatment facility does not have radio communication function basically.Yet, by being connected to communication equipment 10-2, can send the data of handling in the master unit, and can receive transmission information from miscellaneous equipment by wireless transmission.

The flow chart of Figure 19 shows the operating process of communication equipment 10-2, and described communication equipment 10-2 can carry out direct asynchronous communication with other communication equipment in the wireless network of present embodiment.In the actual realization of this operating process, central processing unit 16 is carried out stored program code in the information stores parts 15.Describe the operation of the direct asynchronous communication in the present embodiment wireless network in detail below with reference to this flow chart.

When starting, Wireless Telecom Equipment 10-2 at first is provided with the access control parameter that comprises management information announcement period and request receive window information, and then according to these parameters request receive window (step S21) is set.

Then, Wireless Telecom Equipment 10-2 judges whether the management information of himself regularly arrives (step S22).During being provided with, the access control parameter of step S21 determines the transmission timing of management information.Use and management information exchange district is provided with management information and sends regularly, makes not clash mutually with other communication equipment.

When the management information transmission had regularly arrived, operation was shifted from step S22 " being ", and carries out step S23.In step S23, obtain the numbering and the access control parameter of himself equipment, configuration management information (referring to Figure 13), and in memory buffer 12 interim this information of storage.Then, radio transmitters 13 12 reads management information from the memory buffer, and sends (broadcasting) management information near Wireless Telecom Equipment.After transmission, handle turning back to step S22.By sending the management information of himself, communication equipment 10 can be in this way notified other Wireless Telecom Equipment with himself existence in wireless network.

At this moment, can attempt on the long period, and can on this receives regularly, send management information from another communication equipment receiving management information.

On the other hand, when the transmission of judging himself management information at step S22 does not regularly arrive, then judge whether there is the management information that receives from other communication equipment once more at step S24.

When from other communication equipment receiving management information, handle the then step S25 below " being " breakout of judging rhombus is transferred to, suitable management information is stored in the information stores parts 15, and processing turns back to step S22.Afterwards, management information is used to obtain to be used for sending to other suitable communication equipment the timing of RTS during message transmission.

When in judging rhombus S24, judging, handle the step S26 below " denying " breakout of judging rhombus is transferred to, and judge whether the request receive window of himself arrives not from other communication equipment receiving management information.When the decision request receive window did not arrive, handling " denied that " breakout is transferred to step S27 from this judgement rhombus.Here, in step S27, judge whether receive the data message that sends from the equipment that is connected to interface 11.

If receive the data message of transmission, then handle and transfer to step S28, and then obtain request receive window information according to the management information of the receiving target communication equipment of storage in the information stores parts 15 from the equipment that is connected to interface 11.Whether the reception of then judging the receiving target communication equipment regularly arrives (step S29).

Then respond the reception arrival regularly of receiving target communication equipment, send RTS (step S30).In addition, after sending RTS, be provided with and confirm receive window (step S31) so that receive CTS from the receiving target communication equipment.

When receiving CTS to (step S32) by the communication acknowledgement window, transmission information (step S33).

After message transmission, judge whether (step S34) needs to exchange confirmation of receipt.Confirmation of receipt if desired judges then whether (step S35) exists the confirmation of receipt of reception.When the needs confirmation of receipt, receive window is set so that receive confirmation of receipt, and carries out the operation that receives confirmation of receipt from the receiving target communication equipment.

When not needing confirmation of receipt, perhaps when receiving confirmation of receipt, handle turning back to step S22, and order repeats the asynchronous wireless communication processing.

When step S29 judges that receive window does not arrive,,, handle the arrival that turns back to step S29 and wait for next receive window perhaps when when step S32 does not receive confirmation of receipt perhaps when when step S32 does not receive CTS.

On the other hand, when when step S26 request receive window has arrived, handle and then transfer to step S36 from " being " breakout of this judgement rhombus.Carry out the operation that receives RTS, and judge whether receive RTS (step S37) from another communication equipment.

If receive RTS from another communication equipment, CTS is sent to be suitable for and sends sources traffic equipment (step 38), and the configuration information receive window is so that receive from being suitable for the information (step S39) that sources traffic equipment sends that sends.Then receive from sending the information (step S40) that sources traffic equipment sends by the message pick-up window.

Judge after receiving message transmission whether (step S41) needs confirmation of receipt.Confirmation of receipt if desired judges then whether (step S42) data are correctly received.Then, only when data are correctly received, just send confirmation of receipt (step S43).Then, handle turning back to step S22, and order repeats the asynchronous wireless communication processing.

When step S37 judgement does not receive RTS by the request receive window, perhaps when when step S41 judgement does not need confirmation of receipt, perhaps, handle all turning back to step S22, and repeat asynchronous wireless communication in proper order and handle when when step S42 judgement does not correctly receive data.

In first embodiment of the invention, the communication equipment in the wireless network is periodically set up receive window, and use and management information provides notice to other communication equipment.Communication equipment on the transmission source is configured to use the receive window of receiving target communication equipment to carry out all message transmission.

On the other hand, in the wireless network of second embodiment of the invention, carry out asynchronous communication by the RTS/CTS method.Yet communication equipment 10-2 only uses the receive window by the management information notice between the transmission period of RTS.In transmission/reception of CTS, in the transmission/reception of transmission information and the transmission/reception of confirmation of receipt subsequently, communication equipment 10-2 does not use the receive window by the management information appointment.Yet the affairs of transmission/reception of communication equipment 10-2 response such as RTS and transmission/reception of CTS are provided with the communication acknowledgement window, message pick-up window, confirmation of receipt receive window (referring to Figure 11 and Figure 12) in proper order.

When carrying out asynchronous communication by the RTS/CTS method, can use the distortion of embodiment, wherein have only the specified receive window of management information of other communication party's notice to be used to carry out all transmissions and to receive operation.

The flow chart of Figure 20 shows the operating process of communication equipment 10-2, and wherein by the RTS/CTS method and only use the specified receive window of management information of notifying communication equipment 10-2 from other communication party, communication equipment 10-2 carries out asynchronous communication.CPU 16 reality are carried out this operating process by stored program code in the execution information stores parts 15.Describe the operation of this direct asynchronous communication in detail below with reference to this flow chart.

When starting, Wireless Telecom Equipment 10-2 at first is provided with the access control parameter such as management information announcement period and request receive window information, and then according to these parameters request receive window (step S51) is set.

Then, Wireless Telecom Equipment 10-2 judges whether the transmission of himself management information regularly arrives (step S52).During being provided with, the access control parameter of step S51 determines the transmission timing of management information.Use and management information exchange district is provided with the transmission timing of management information, makes not clash mutually with other communication equipment.

When the transmission of management information had regularly arrived, operation was shifted from step S52 " being ", and carries out step S53.In step S53, obtain the numbering and the access control parameter of himself equipment, configuration management information (referring to Figure 13), and in memory buffer 12 interim this information of storage.Then, radio transmitters 13 12 reads management information from the memory buffer, and sends (broadcasting) management information near Wireless Telecom Equipment.After transmission, handle turning back to step S52.By sending the management information of himself, communication equipment 10-2 can be in this way notifies other Wireless Telecom Equipment with himself existence in wireless network.

At this moment, can attempt on the long period, and can in receiving regularly, send management information from another communication equipment receiving management information.

On the other hand, when the transmission of judging himself management information at step S52 does not regularly arrive, then judge whether there is the management information that receives from other communication equipment once more at step S54.

When from other communication equipment receiving management information, handle the then step S55 below " being " breakout of judging rhombus is transferred to, suitable management information is stored in the information stores parts 15, and processing turns back to step S52.Afterwards, this management information is used to obtain to be used for sending to other suitable communication equipment the timing of RTS during message transmission.

When in judging rhombus S54, judging, handle the step S56 below " denying " breakout of judging rhombus is transferred to, and judge whether the request receive window of himself arrives not from other communication equipment receiving management information.When the decision request receive window did not arrive, handling " denied that " breakout is transferred to step S57 from this judgement rhombus.Here, in step S57, judge whether receive the data message that sends from the equipment that is connected to interface 11.

If receive the transmission data message, then handle and transfer to step S58, and then ask receive window information according to the management information acquisition of the receiving target communication equipment of storage in the information stores parts 15 from the equipment that is connected to interface 11.Whether the reception of then judging the receiving target communication equipment regularly arrives (step S59).Then respond the reception arrival regularly of receiving target communication equipment, send RTS (step S60).

Then, attempt receiving operation (step S61) by the receive window of following communication equipment 10-2, described receive window is used for receiving CTS from the communication equipment of receiving terminal.If can receive CTS, then after waiting for the arriving of receiving terminal communication equipment near receive window, transmission information (step S62).

After message transmission, judge whether (step S63) needs to exchange confirmation of receipt.The confirmation of receipt (step S64) that whether has reception is then judged in confirmation of receipt if desired.When the needs confirmation of receipt, receive window is set so that receive confirmation of receipt, and receives confirmation of receipt from the receiving target communication equipment.

When not needing confirmation of receipt, perhaps when receiving confirmation of receipt, handle turning back to step S52, and order repeats the asynchronous wireless communication processing.

When step S59 judges that receive window does not arrive,,, handle the arrival that turns back to step S59 and wait for next receive window perhaps when when step S64 does not receive confirmation of receipt perhaps when when step S61 does not receive CTS.

On the other hand, when when step S56 request receive window has arrived, handle and then transfer to step S65 from " being " breakout of this judgement rhombus.Carry out the operation that receives RTS, and judge whether receive RTS (step S66) from another communication equipment.

If receive RTS from another communication equipment, then obtain to be suitable for the management information that sends sources traffic equipment from information stores parts 15, and wait for arrive near receive window after, send CTS (step S67).Follow by himself receive window and receive from sending the information (step S68) that sources traffic equipment sends.

After receiving the information that sends, judge whether (step S69) needs confirmation of receipt.Confirmation of receipt if desired judges then whether (step S70) data are correctly received.Only when correct when receiving data, after waiting the arriving of sources traffic equipment end to be sent, send confirmation of receipt (step S71) near receive window.Then, handle turning back to step S52, and order repeats the asynchronous wireless communication processing.

When step S66 judgement does not receive RTS by the request receive window, perhaps when when step S69 judgement does not need confirmation of receipt, perhaps, handle all turning back to appropriate step, and repeat asynchronous wireless communication in proper order and handle when when step S70 judgement does not correctly receive data.

Side information

The front is with reference to specifying embodiment to describe the present invention.Yet those skilled in the art will appreciate that under the prerequisite that does not depart from scope of the present invention and aim, can make amendment and replace embodiment.

Example in this specification applies the present invention to wireless network so that carry out the asynchronous information transmission.Certainly, the present invention also can be applied to the synchronizing information communication network.

In other words, use various examples to disclose the present invention, and the present invention should not be construed as limited to the content of this specification.In order to determine flesh and blood of the present invention, should be with reference to the part that comprises claim herein.

Industrial applicibility

The present invention can provide fabulous wireless communication system and wireless communication control method, and is wireless Communication equipment and wireless communications method, and computer program, they can be configured for directly The wireless network of asynchronous communication, terminal is confirmed the existence of other terminal mutually simultaneously. In other words, The present invention can carry out direct asynchronous communication between Wireless Telecom Equipment, serve as and need not to install The equipment of control station.

The present invention can also carry out the asynchronous information transmission, is in not disconnecting and need not communication equipment Receive wait state. In other words, Wireless Telecom Equipment relevant himself the reception of giving advance notice is fixed The time, the information of receive window and receiving cycle, so that by receiving at this window, logical Letter equipment can be carried out receiving function with low power, because be different from the situation of prior art, this Invention needn't keep constantly receiving wait state.

The present invention can also be according to the in the past management of other communication equipment of reception of its communication equipment Information is carried out communication. In this way, can carry out wireless transmission, and need not to obtain The means of the use of precheck transmission line are so that pass with quite short time execution information Defeated.

Therefore, can provide a kind of access control method, the method can prevent asynchronous wireless The communication contention aware of communication period, and need not with for example coming control hazard to avoid by carrier detect Random access control method.

Regularly overlapping to prevent in the reception that a plurality of communication equipments arrange by skew, also can To realize being not easy between a plurality of communication equipments, produce the access control of communication contention aware.

By setting up synchronously the management information exchange district so as between a plurality of communication equipments exchanging tube Reason information also can realize being effective to the access control method of a plurality of communication equipments, and not have Need to install control station or the access point that serves as basis in the wireless network.

In addition, by providing when on definite time span, not receiving from Wireless Telecom Equipment When containing the signal of identifier and timing information, judge no longer to exist and this Wireless Telecom Equipment Connection and the function of this connection of deletion from memory, can be at Wireless Telecom Equipment logical The interior Radio Network System of realizing being used for the configuration autonomous wireless networks of letter scope, and need not strictly to decide The justice wireless network.

In addition, when needing the transmission of the guaranteed service quality of tool (QoS), pass through dispatch tube Reason information is to notify this transmission will resemble for example keeping in the transmission to advance with guaranteed QoS OK, can easily realize the radio communication of the guaranteed QoS of tool.

In addition, the management information by sending communication equipment with notice can with this communication equipment Whether other communication equipment of communication exists, and can know to show centered by this communication equipment The structural area of wireless network.

According to the present invention, provide fabulous wireless communication system and radio communication controlling party Method, Wireless Telecom Equipment and wireless communications method, and computer program, they can pass through Asynchronous wireless communication is carried out in the RTS/CTS access control, and need not to make communication equipment to be in not disconnecting Receive wait state to detect the RTS signal.

According to the present invention, by minimum required receive window and simultaneously mutually exchange are set respectively Management information, each Wireless Telecom Equipment are carried out minimum required reception operation, make it possible to realize The RTS/CTS catenation sequence. Be different from prior art, do not need to be in continuous reception and wait for shape Attitude is so realized low power consumption operation. Because whether receive window only need detect to exist and be addressed to The information of himself communication equipment can arrange very short receive window, makes it possible to realize Operation with very low-power consumption.

By corresponding receive window is set as required, can simplify receiving operation, because Even during the ultrahigh speed wireless transmission, also needn't receive the decode all that transmission line flows Information.

Can obtain to be addressed to the information of himself communication equipment, be used for receiving and need not to use The high speed processor of the information that in the ultrahigh speed transmission, sends.

Claims

1. the wireless communication system that is used between a plurality of Wireless Telecom Equipments the information that sends, exchange of management information between Wireless Telecom Equipment wherein, described management information are described the reception of himself communication equipment and are handled regularly; And

Wireless Telecom Equipment on the transmission source is handled regularly by the reception of describing in the use and management information, and the Wireless Telecom Equipment on receiving target sends information.

2. wireless communication system as claimed in claim 1, wherein sending the source Wireless Telecom Equipment uses the receive window of describing in the management information of receiving target Wireless Telecom Equipment to send communication request or RTS (request sends), and by connecting transmission information in response to receiving the communication acknowledgement or the CTS (clear to send) that return from the receiving target Wireless Telecom Equipment.

3. the wireless communication control method that is used for the information that sends from a plurality of Wireless Telecom Equipments, wherein

Exchange of management information between Wireless Telecom Equipment, described management information are described the reception of himself communication equipment and are handled regularly; And

Transmission source Wireless Telecom Equipment is handled regularly by the reception of describing in the use and management information and is sent information to the receiving target Wireless Telecom Equipment.

4. wireless communication control method as claimed in claim 3, wherein

Management information comprises the device id information unique to each corresponding Wireless Telecom Equipment; And

When the management information that receives from another corresponding Wireless Telecom Equipment, to another corresponding Wireless Telecom Equipment, and the control of corresponding Wireless Telecom Equipment receives and handles regularly Wireless Telecom Equipment with the device id associating information.

5. wireless communication control method as claimed in claim 3, wherein

Management information contains and is useful on the timing information that the receive window that Wireless Telecom Equipment carry out to receive handles is set, and contains and be useful on the cycle information that receive window is set.

6. wireless communication control method as claimed in claim 3, wherein

Communication equipment is regularly arranged receive window by skew, makes that receiving the processing cycle does not overlap each other.

7. wireless communication control method as claimed in claim 3, wherein

Communication equipment sends the management information of himself according to each specified period.

8. wireless communication control method as claimed in claim 3, wherein

Communication equipment sends himself management information according to each specified period, and management information comprises the announcement period information that is used for sending to other communication equipment management information.

9. wireless communication control method as claimed in claim 3, wherein

Communication equipment is in response to the existence of the corresponding Wireless Telecom Equipment of the receiving check of management information in wireless network, and when having passed through the stipulated time after the receiving management information in the end, judges that communication equipment no longer is present in the wireless network.

10. wireless communication control method as claimed in claim 3, wherein

Set up the management information exchange district so as between a plurality of Wireless Telecom Equipments exchange of management information.

11. wireless communication control method as claimed in claim 3, wherein

The transmission of the communication quality that whether needs to have assurance can be described in management information; And

When in the management information of receiving target Wireless Telecom Equipment, describing, send the information that the source Wireless Telecom Equipment sends the communication quality with assurance at the requiring of the transmission of communication quality with assurance.

12. wireless communication control method as claimed in claim 3, wherein

Management information comprises the information about the Wireless Telecom Equipment that can communicate by letter with this Wireless Telecom Equipment.

13. wireless communication control method as claimed in claim 3, wherein

Transmission source Wireless Telecom Equipment uses the receive window of describing in the management information of receiving target Wireless Telecom Equipment to send RTS (request sends) signal, and by connecting transmission information in response to receiving the CTS (clear to send) that sends from the receiving target Wireless Telecom Equipment.

14. wireless communication control method as claimed in claim 13, wherein

In response to send RTS (request sends) to the receiving target Wireless Telecom Equipment, send source Wireless Telecom Equipment foundation and confirm receive window so that receive CTS (clear to send) from the receiving target Wireless Telecom Equipment; And

Transmission source Wireless Telecom Equipment confirms that by using receive window receives CTS (clear to send).

15. wireless communication control method as claimed in claim 13, wherein

The Wireless Telecom Equipment that receives RTS (request sends) signal uses the receive window of describing in the management information of transmission source Wireless Telecom Equipment to return CTS (clear to send).

16. wireless communication control method as claimed in claim 13, wherein

In response to returning CTS (clear to send) to the source of transmission Wireless Telecom Equipment, the receiving target Wireless Telecom Equipment is set up the message pick-up window so that receive from sending the information that the source Wireless Telecom Equipment sends; And

Transmission source Wireless Telecom Equipment uses the message pick-up window to send information.

17. wireless communication control method as claimed in claim 13, wherein

In response to receiving CTS (clear to send) signal, send the source Wireless Telecom Equipment and use the receive window of describing in the management information of receiving target Wireless Telecom Equipment to send information from the receiving target Wireless Telecom Equipment.

18. wireless communication control method as claimed in claim 13, wherein

After transmission information, send the source Wireless Telecom Equipment and the confirmation of receipt receive window is set so that receive confirmation of receipt from the receiving target Wireless Telecom Equipment; And

The receiving target Wireless Telecom Equipment uses the confirmation of receipt receive window to send confirmation of receipt.

19. wireless communication control method as claimed in claim 13, wherein

Receiving after the information that sends source Wireless Telecom Equipment transmission, the receiving target Wireless Telecom Equipment uses the receive window of describing in the management information of transmission source Wireless Telecom Equipment to send confirmation of receipt.

20. be used for the Wireless Telecom Equipment of the information that sends by wireless network, comprise:

The receiving system that is used to the information that receives,

The management information storage device is used to store the management information that receives from other Wireless Telecom Equipment, simultaneously the management information that receives is associated with corresponding Wireless Telecom Equipment,

The dispensing device that is used to the information that sends; With

21. Wireless Telecom Equipment as claimed in claim 20, wherein

Management information contains the timing information that is useful on the receive window that Wireless Telecom Equipment execution reception processing is set, and the cycle information that is used to be provided with receive window.

22. Wireless Telecom Equipment as claimed in claim 20 also comprises:

Network control unit is used for the reception of response management information and checks the existence of corresponding Wireless Telecom Equipment at wireless network, and when having passed through the stipulated time after in the end receiving its management information, judges that communication equipment no longer is present in the wireless network.

23. Wireless Telecom Equipment as claimed in claim 20, wherein

When describing at the requiring of the transmission of the communication quality with assurance in the management information of receiving target Wireless Telecom Equipment, access control apparatus is carried out the access control of the communication quality with assurance.

24. Wireless Telecom Equipment as claimed in claim 20, wherein

Access control apparatus uses the receive window control of describing in the management information of receiving target Wireless Telecom Equipment to send the timing of RTS (request sends), and in response to receiving CTS (clear to send) from the receiving target Wireless Telecom Equipment, the timing of control transmission information.

25. Wireless Telecom Equipment as claimed in claim 24, wherein

In response to send RTS (request sends) to the receiving target Wireless Telecom Equipment, access control apparatus foundation is used for receiving from the receiving target Wireless Telecom Equipment affirmation receive window of CTS (clear to send), and control uses receiving system to receive from the timing of the CTS (clear to send) of receiving target Wireless Telecom Equipment transmission.

26. Wireless Telecom Equipment as claimed in claim 24, wherein

In response to receiving CTS (clear to send), by the message pick-up window that uses the receiving target Wireless Telecom Equipment to set up for the information that receives transmission, the timing of access control apparatus control transmission information.

27. Wireless Telecom Equipment as claimed in claim 24, wherein

In response to receiving CTS (clear to send), by the receive window of describing in the management information of using the receiving target Wireless Telecom Equipment, the timing of access control apparatus control transmission information.

28. Wireless Telecom Equipment as claimed in claim 24, wherein

Access control apparatus is provided with the confirmation of receipt receive window so that receive confirmation of receipt from the receiving target Wireless Telecom Equipment after transmission information, and control receives the timing of confirmation of receipt from the receiving target Wireless Telecom Equipment.

29. be used for sending information so that carry out the wireless communications method of message transmission, comprise step by wireless network:

Use the reception of describing in the management information of receiving target Wireless Telecom Equipment to handle periodically sending information.

30. wireless communications method as claimed in claim 29, wherein

31. wireless communications method as claimed in claim 29 also comprises step:

The reception of response management information and check the existence of corresponding Wireless Telecom Equipment in the wireless network, and when after in the end receiving its management information, having passed through the stipulated time, judge that communication equipment no longer is present in the wireless network.

32. wireless communications method as claimed in claim 29, wherein

When describing at the requiring of the transmission of the communication quality with assurance in the management information of receiving target Wireless Telecom Equipment, transmitting step sends the information of the communication quality with assurance.

33. wireless communications method as claimed in claim 29, wherein

Transmitting step uses the receive window of describing in the management information of receiving target Wireless Telecom Equipment to send RTS (request sends), and comprises step:

In response to receiving CTS (clear to send) from corresponding receiving target Wireless Telecom Equipment, the start information transmission.

34. wireless communications method as claimed in claim 33 also comprises step:

In response to send RTS (request sends) to the receiving target Wireless Telecom Equipment,, receive CTS (clear to send) from the receiving target Wireless Telecom Equipment by the affirmation receive window that receives CTS (clear to send) from the receiving target Wireless Telecom Equipment is set.

35. wireless communications method as claimed in claim 33, wherein

In response to receiving CTS (clear to send), by the message pick-up window that uses the receiving target Wireless Telecom Equipment to set up for the information that receives transmission, the step that is used for the start information transmission sends information.

36. wireless communications method as claimed in claim 33, wherein

In response to receiving CTS (clear to send), by the receive window of the information described in the management information of using the receiving target Wireless Telecom Equipment, be used to receive transmission, the step that is used for the start information transmission sends information.

37. wireless communications method as claimed in claim 33 also comprises step:

After transmission information,, receive really view from the receiving target Wireless Telecom Equipment by being provided for receiving the confirmation of receipt receive window of confirmation of receipt from the receiving target Wireless Telecom Equipment.

38. be used for the Wireless Telecom Equipment of the information that sends by wireless network, comprise:

The receiving system that is used to the information that receives;

Be used to send the dispensing device of management information; With

Access control apparatus is used for the reception timing according to management information control receiving system, and the control dispensing device sends the transmission timing of management information.

39. Wireless Telecom Equipment as claimed in claim 38, wherein

Management information contains to be useful on and corresponding Wireless Telecom Equipment is set carries out the timing information that receives the receive window of handling, and contains and be useful on the cycle information that receive window is set.

40. Wireless Telecom Equipment as claimed in claim 38, wherein

By skew regularly make receive the processing cycle not with same wireless network in cycle of other Wireless Telecom Equipment overlapping, the management information generation device is arranged receive window.

41. Wireless Telecom Equipment as claimed in claim 38, wherein

Dispensing device sends the management information of himself according to each specified period.

42. Wireless Telecom Equipment as claimed in claim 38, wherein

The management information generation device is described the announcement period information that is used for sending to other Wireless Telecom Equipment management information; And

Access control apparatus is used for periodically sending the timing of management information according to the announcement period information Control.

43. Wireless Telecom Equipment as claimed in claim 38, wherein

Access control apparatus uses the management information exchange district control of setting up in the wireless network to be used to send the timing of management information.

44. Wireless Telecom Equipment as claimed in claim 38, wherein

The management information generation device is described the relevant information transmitted that whether needs to have the communication quality of assurance in management information.

45. Wireless Telecom Equipment as claimed in claim 38, wherein

The management information generation device is described the information about the Wireless Telecom Equipment that can communicate by letter with corresponding Wireless Telecom Equipment.

46. Wireless Telecom Equipment as claimed in claim 38, wherein

Access control apparatus receives the timing of RTS (request sends) from other Wireless Telecom Equipment according to the receive window control of describing in the management information.

47. Wireless Telecom Equipment as claimed in claim 46, wherein

Dispensing device returns CTS (clear to send) in response to receiving RTS (request sends).

48. Wireless Telecom Equipment as claimed in claim 46, wherein

In response to returning CTS (clear to send), access control apparatus is set up the message pick-up window so that receive the information that sends from other corresponding Wireless Telecom Equipment.

49. Wireless Telecom Equipment as claimed in claim 46, wherein

After corresponding Wireless Telecom Equipment reception information from other, dispensing device returns confirmation of receipt.

50. be used for receiving information so that carry out the wireless communications method of message transmission, comprise step by wireless network:

Send management information to other Wireless Telecom Equipment; With

The reception of describing in the use and management information is handled and is regularly come reception information.

51. wireless communications method as claimed in claim 50, wherein

52. wireless communications method as claimed in claim 50, wherein

By skew regularly make receive the processing cycle not with same wireless network in cycle of other Wireless Telecom Equipment overlapping, the step that produces management information is arranged receive window.

53. wireless communications method as claimed in claim 50, wherein

The step that is used to send management information sends the management information of himself according to designated period.

54. wireless communications method as claimed in claim 50, wherein

The step that is used to produce management information is described the announcement period information that is used for sending to other Wireless Telecom Equipment management information; And

Be used to send the step of management information according to announcement period property information cycle transmission management information.

55. wireless communications method as claimed in claim 50, wherein

Be used for sending the management information exchange district that the step of management information uses wireless network to set up and send management information.

56. wireless communications method as claimed in claim 50, wherein

The step that is used for producing management information is described the relevant information transmitted that whether needs to have the communication quality of assurance in management information.

57. wireless communications method as claimed in claim 50, wherein

The step that is used to produce management information is described the information about the Wireless Telecom Equipment that can communicate by letter with corresponding Wireless Telecom Equipment.

58. wireless communications method as claimed in claim 50, wherein

Be used for the receive window that the step of the information that receives is described according to management information, carry out to receive at the RTS that sends from other Wireless Telecom Equipment (request sends) and handle.

59. wireless communications method as claimed in claim 58 also comprises step:

Return CTS (clear to send) in response to receiving RTS (request sends).

60. wireless communications method as claimed in claim 58 also comprises step:

In response to returning CTS (clear to send), set up the message pick-up window so that receive the information that sends from another Wireless Telecom Equipment.

61. wireless communications method as claimed in claim 58 also comprises step:

Receiving after the information that another Wireless Telecom Equipment sends, return confirmation of receipt.

62. with the computer program that computer-readable format is write, be used on computer system, moving wireless communication process,, carrying out message transmission, and comprise step so that send information by wireless network:

63. with the computer program that computer-readable format is write, be used on computer system, moving wireless communication process,, carrying out message transmission, and comprise step so that receive information by wireless network:

Send management information to other Wireless Telecom Equipment; With